如何使用「恢復工具」來修復perfino h2數據庫？

Question

我們的Perfino服務器最近崩潰，從那時起記錄下面顯示的錯誤。 （有一些線索暗示OutOfMemory導致損壞的數據庫。）

建議：'可能的解決方案：使用恢復工具'。但官方的perfino文檔和日誌都沒有提供關於如何進行的更多指導。

那麼這裏的問題：如何使用恢復工具？

堆棧跟蹤：

ERROR [collector] server: could not load transaction data 
org.h2.jdbc.JdbcSQLException: File corrupted while reading record: "[495834] stream data key:64898 pos:11 remaining:0". Possible solution: use the recovery tool; SQL statement: 
SELECT value FROM transaction_names WHERE id=? [90030-176] 
    at org.h2.message.DbException.getJdbcSQLException(DbException.java:344) 
    at org.h2.message.DbException.get(DbException.java:178) 
    at org.h2.message.DbException.get(DbException.java:154) 
    at org.h2.index.PageDataIndex.getPage(PageDataIndex.java:242) 
    at org.h2.index.PageDataNode.getNextPage(PageDataNode.java:233) 
    at org.h2.index.PageDataLeaf.getNextPage(PageDataLeaf.java:400) 
    at org.h2.index.PageDataCursor.nextRow(PageDataCursor.java:95) 
    at org.h2.index.PageDataCursor.next(PageDataCursor.java:53) 
    at org.h2.index.IndexCursor.next(IndexCursor.java:278) 
    at org.h2.table.TableFilter.next(TableFilter.java:361) 
    at org.h2.command.dml.Select.queryFlat(Select.java:533) 
    at org.h2.command.dml.Select.queryWithoutCache(Select.java:646) 
    at org.h2.command.dml.Query.query(Query.java:323) 
    at org.h2.command.dml.Query.query(Query.java:291) 
    at org.h2.command.dml.Query.query(Query.java:37) 
    at org.h2.command.CommandContainer.query(CommandContainer.java:91) 
    at org.h2.command.Command.executeQuery(Command.java:197) 
    at org.h2.jdbc.JdbcPreparedStatement.executeQuery(JdbcPreparedStatement.java:109) 
    at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:353) 
    at com.perfino.a.f.b.a.a(ejt:70) 
    at com.perfino.a.f.o.a(ejt:880) 
    at com.perfino.a.f.o.a(ejt:928) 
    at com.perfino.a.f.o.a(ejt:60) 
    at com.perfino.a.f.aa.a(ejt:783) 
    at com.perfino.a.f.o.a(ejt:847) 
    at com.perfino.a.f.o.a(ejt:792) 
    at com.perfino.a.f.o.a(ejt:787) 
    at com.perfino.a.f.o.a(ejt:60) 
    at com.perfino.a.f.ac.a(ejt:1011) 
    at com.perfino.b.a.b(ejt:68) 
    at com.perfino.b.a.c(ejt:82) 
    at com.perfino.a.f.o.a(ejt:1006) 
    at com.perfino.a.i.b.d.a(ejt:168) 
    at com.perfino.a.i.b.d.b(ejt:155) 
    at com.perfino.a.i.b.d.b(ejt:52) 
    at com.perfino.a.i.b.d.a(ejt:45) 
    at com.perfino.a.i.a.b.a(ejt:94) 
    at com.perfino.a.c.a.b(ejt:105) 
    at com.perfino.a.c.a.a(ejt:37) 
    at com.perfino.a.c.c.run(ejt:57) 
    at java.lang.Thread.run(Thread.java:745) 

Answer 1

注：我無法與下面描述的步驟恢復我的數據庫。我仍然把這篇文章作爲參考，因爲成功恢復的可能性取決於數據庫的破損程度，並且沒有證據表明這個程序是無效的。

---

Perfino默認使用H2 Database Engine作爲其持久性存儲。 H2具有一個recovery tool和run script tool導入SQL語句：

# 1. Create a dump of the current database using the tool [1] 
# This tool creates a 'config.h2.sql' and a 'perfino.h2.sql' db dump 
cd ${PERFINO_DATA_DIR} 
java -cp ${PATH_TO_H2_LIB}/h2*.jar org.h2.tools.Recover 

# 2. Rename the corrupt database file to e.g. *bkp 
mv perfino.h2.db perfino.h2.db.bkp 

# 3. Import the dump from step 1, ignoring errors 
java -cp ${PATH_TO_H2_LIB}/h2*.jar \ 
    org.h2.tools.RunScript \ 
    -url jdbc:h2:${PERFINO_DATA_DIR}/db/perfino \ 
    -script perfino.h2.sql -checkResults 

^{[1]：Perfino包括${PERFINO_INSTALL_DIR}/lib/common/h2.jar下一個版本的h2.jar的。您當然可以下載official jar並嘗試使用它，但在我的情況下，我只能使用perfino提供的jar來恢復數據庫。}

---

這失敗我一個

Exception in thread "main" org.h2.jdbc.JdbcSQLException: Feature not supported: "Restore page store recovery SQL script can only be restored to a PageStore file"。

如果您遇到這種情況，請嘗試：

# 1. Delete database and mv files 
cd ${PERFINO_DATA_DIR} 
rm perfino.h2.db perfino.mv.db 

# 2. Create a PageStore database manually 
touch perfino.h2.db 

# 3. try with MV_STORE=FALSE on the url [2] 
java -cp ${PATH_TO_H2_LIB}/h2*.jar \ 
    org.h2.tools.RunScript \ 
    -url jdbc:h2:${PERFINO_DATA_DIR}/db/perfino;MV_STORE=FALSE \ 
    -checkResults \ 
    -continueOnError 

_{[2]：力H2重新建立一個pagestore分貝，而不是新的存儲引擎（見this thread in metabase）}